Pencil-sharpener.



E. SUTHERLAND. PENCIL SHARPENER. APPLICATION FILED SEPT. 24. 1907.

.91 1;'7'78. mem-,ea Feb. 9, 1909.

EMIL SUTIIERLAND, 0F Los ANGELES, CALIFORNIA, AssIGNoR To WILLIAM PILE,or Los ANGELES, CALIFORNIA.

PENCIL-SHARPENER. y l

Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed September 24, 1907. v Serial No. 394,255.

To all whom 'it may concern: I Be it .kno-wn that I, EMIL SUTHERLAND, acitizen of the United States, residing at Los Angeles, in the county ofLos Angeles and' .State of California, have invented new and useful Imrovements in Pencil-Sharpeners,

of which Vt e following isa specification.

The prime object of myy invention is to provide. a device which Willautomatically sharpen a pencil to any configuration desired and whichwill so hold the pencil point dur ing the processof sharpening thatitisim' possible to break the point.

A further object is to provide .a device vwhichjmay be arranged tosharpen a pencil to a point of any degree of concavity so that whichcarrieslarge gear 10.

a Vmaximum ,amount of lead may be-eX1 posed 'by cutting away a minimumamount ofV encil. stock. y

. further 'Objectis to provide a'device which is sim le in constructionand operation and W 'ch may be cheaply lmanufactured forthe trade.'l

l accomplish these objects by means of Athe device described herein andillustrated in the accompanyingl drawings in whichz Figure 1 isg'an endelevation'l of myl improved pencil sharpener with aV pencil, in placetherein. Fig. 2 is a sectional elevation taken onk line"212 of Fig. 1.Fig-3 isa plan view of the device with the cutter disk in section. Fig.4 isa sectional view ofl the pencil holder.V

Referring to the drawings 5 designates a suitable base or frame uponA,which are mounted standalds 6 and 7 whichsupport.

cutter shaft 8 journaled therein. Shaft V8 carries a pinion 9 whichmesheswith agear 10 journaledin' lstandards 7- and provided with a crank11 by means ofwhich it may be rotatedfto rotatefthe'shaft 81.., lShaft 8also carries a cutterv disk l12- 'rigidly` mounted.

thereon .which is provided `with a of knives` 13. `Dsk 12H'is .providedwith a truncated conical portion 14 whoseinclina.- tion to the bodyortion of disk l12 may vary to suit the need of any-particular usage.

Knives 13, are mounted on thel inside of Vthis cone shaped portiom-whicnis hollow, `;byv means of' screws' I5 yand; adjusting screws16,f the endor cutting edge of ,the knifel proj ectf ing throu h apertures-17 in thecone Yshaped portion o 'the disk'. ''By 'means vof' adjuSlT/ing. screwsA16 the amount' by which the edgefLof,

the knife stands abovethe cone shaped Fig. 3.

cned or only "face of the disk may be varied so as to take pencil whichis pinion 23 mounted onshaft 24 which carries on its'other end a beveledgear 25 meshing with a similar gear 26 on crank shaft 27 Thus it will beseenl that when crank'll is turned sleeve 21 will be slowly rotatedwhile cutter disk 12 will be rapidly rotated.

`As hereinbefore mentioned sleeve is mounted on extension 18 beingsecured thereto by means of a hinge 28 one of'whose' members is securedto extension 18 and the other being a frame 29 which is secured tosleeve 20 at one end thereof as shown in A flat spring 30 is rigidlysecured on extension 18 and presses outwardly against l frame 29 so thatthe inner end of sleeve 20 'is forced towards cutter disk 12. The innerend of sleeve 20 is provided with a pencil guard l31 which resembles ahalf cone in configuration as shown most clearly in Fig. 3. k'llie outerend of sleeve 21 is provided with a pencil clamp which consists of twopivoted members 32 mounted on gear 22 and having jaws 0f a semicircularconfiguration.4 Flasprings 33 press these jaws towards each other andinto engagement with pencil 34 which is placed in position as shown inthe drawings.`

When a Vencil has been placed in the machine -cran 11, is rotatedthereby rotating c utterdisk 12 -toiforce knivesfl against the encil andto cut the` stock of the same away.

Lhe "pencil is meanwlnile revolved so that the 'engagement withtheknives by spring 30.'

1 It isyobvious that the pencilcan move inwardly as fast as it iscutaway as 'it is other- Wise'- impossible :for it 'to ententhe. cone'in shaped guard; -Thus it `will be seen that the `oint' of the pencilwill be always supported beavoided. 1

`"the pencils'wi'll be sharpened to a concave p'omt as knives- 13 do pnotwreyolve `in aplane i' y the guard whether the same isfully sharp.4

partly soandall breakagepwlllI `t will further be manifest'that4 throughtheir cutting ed es and it will be seen lthat the concavity o the ointmay be varied by varying the angle wich the cone shaped portion of disk12 makes to the body thereof. cone shaped portion approaches that of acylinder a maximum concavity of the pencil point will be'obtained, theamount of this concavity depending upon the radius` at which the knifeedges revolve. On the other hand ifvthe cone shape portion becomesflatter the concavity of the pencil point will approach a minimum. 'Iheob- Ject of having the pencil point concave is readily understood as itis possible to thus produce a pencil point which exposes the maximumamount of lead by cutting away ythe minimum amount of wood, thus makinga point which may be used a long time without being re-sharpened andalso providing a point which is strong' on account of its shortness.A

Havmg described my invention what I .claim as new and desire to securgeby Letters Patent is zs, .g 1. In a device ofthe class described, aframe; a conical cutter disk provided with a plurality of cutter' knivesrotatively mounted in said frame; a spring pressed pencil holder(pivotally mounted on said frame" and adapte to press a pencil againstsaid cutter disk; and means to rotate said pencil comprising a revolublesleeve mounted in rsaid pencil holder, said revoluble sleeve rovidedwith a plurality of spring presse clam s adapted to engage with thepencil and ho d the same menge ement with the sleeve.

2. In a encil s arpener, a rotating member of hol ow truste-conicalconfiguration, l

said member being provided with slots leading from itsA hollow interiorto its rusto- 'Ihus if the configuration of the conical face, and knivesmounted on the inner surface of said member, thecutting edges of saidknives projecting through the slots in said member.

3. A pencil Sharpener comprising a frame, a frusto-conical cutter memberrotatively mounted in said frame, knives mounted on said member, arevoluble pencil holder pivaxis of said holder being at right angles tothe pencil held therein, resilient means to press said holder towardssaid cutter member, and means to rotate said cutter member and saidpencil holder.

4. A pencil Sharpener comprising a frame,

'a'hollow frustoconical cutter member ro-l the vside of sal guard towardsaid cutter member` being removed, resilient means te press said holdertowards said cutter meinber, and meansto rotate said cutter member andsaid pencil holder.

In witness that I claim the foregoing I v have hereunto subscribed myname this 17th day of September, 1907.

EMIL SUTHERLAND.l

Witnesses:

TRIMBLE BARKELEW,

OLLrE PALMER.

otally mounted on said frame, the pivotal adapted to suport the point ofthe pencil,

